Hello,
Unfortunately we haven't received a similar issue before for email campaigns in cooperation with Amazon SES (Simple Email Service). Please note that Sitefinity is not responsible for limitations in
SMTP servers that will cause unexpected and unwanted results in the statistics and deliveries.
I understand that the site is in production but I will strongly recommend you to change your
SMTP server.
All the best,
Veronica Milcheva
the Telerik team
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